LU-10810 ptlrpc: introduce OST_SEEK RPC

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_io.c

diff --git a/lustre/osd-ldiskfs/osd_io.c b/lustre/osd-ldiskfs/osd_io.c
index e1fea27..8ce4b08 100644 (file)
--- a/lustre/osd-ldiskfs/osd_io.c
+++ b/lustre/osd-ldiskfs/osd_io.c
@@ -2335,15 +2335,18 @@ static loff_t osd_lseek(const struct lu_env *env, struct dt_object *dt,
        LASSERT(dt_object_exists(dt));
        LASSERT(osd_invariant(obj));
        LASSERT(inode);
+       LASSERT(offset >= 0);
 
        file = osd_quasi_file(env, inode);
        result = file->f_op->llseek(file, offset, whence);
-       /* when result is out of file range then it must be virtual hole
-        * at the end of file, but this is not real file end, so return
-        * just -ENXIO and LOV will merge all results
+
+       /*
+        * If 'offset' is beyond end of object file then treat it as not error
+        * but valid case for SEEK_HOLE and return 'offset' as result.
+        * LOV will decide if it is beyond real end of file or not.
         */
-       if (result == i_size_read(inode))
-               result = -ENXIO;
+       if (whence == SEEK_HOLE && result == -ENXIO)
+               result = offset;
 
        CDEBUG(D_INFO, "seek %s from %lld: %lld\n", whence == SEEK_HOLE ?
                       "hole" : "data", offset, result);